Entry from US English dictionary
[usually treated as singular]
A sunflowerlike composite plant of the western US, with large oval leaves.
- Genus Wyethia, family Compositae: several species, including the yellow-flowered gray mule ears (W. helenioides), with gray-haired leaves and very large bracts, and the white-flowered white mule ears (W. helianthoides)
Definition of mule ears in: